Every project is a new challenge, a new opportunity to learn.

I have been a selfish being all my life, in practice, though not in principle.

All who joy would win must share it. Happiness was born a twin.

安排任何来到你身边的碎片。

我们从这样的假设开始：任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。